# 1999 GMC Sierra PU...Fuel Pump Question? Low fuel pressure...Replace...or Do Nothing

**URL:** <https://community.cartalk.com/t/1999-gmc-sierra-pu-fuel-pump-question-low-fuel-pressure-replace-or-do-nothing/2670>\
**Category:** Power/Fuel\
**Tags:** pump, gasoline\
**Created:** [August 5, 2007, 8:17pm UTC](https://community.cartalk.com/t/1999-gmc-sierra-pu-fuel-pump-question-low-fuel-pressure-replace-or-do-nothing/2670 "2007-08-05T20:17:28Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![america\_now](https://avatars.discourse-cdn.com/v4/letter/a/c68b51/32.png) [@america\_now](https://community.cartalk.com/u/america_now)\
**Post date:** [August 5, 2007, 8:17pm UTC](https://community.cartalk.com/t/1999-gmc-sierra-pu-fuel-pump-question-low-fuel-pressure-replace-or-do-nothing/2670/1 "2007-08-05T20:17:28Z")

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I took my truck into a local garage…  
  
 the tech…said he checked the fuel  
  
 pressure…and it was low…He recommends that I replace the fuel pump? Truck runs fine…but sometimes  
  
 now…when truck warm…takes a little longer to start??? What should I do?

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**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [August 5, 2007, 10:54pm UTC](https://community.cartalk.com/t/1999-gmc-sierra-pu-fuel-pump-question-low-fuel-pressure-replace-or-do-nothing/2670/2 "2007-08-05T22:54:07Z")

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For now, turn the key to “ON” and wait 5 seconds before turning to “START.” Eventually you will need a new fuel pump. I recommend scheduling the pump replacement at YOUR convenience rather than waiting for it to die and leave you stranded somewhere on a cold, snowy night.

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**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [August 5, 2007, 10:55pm UTC](https://community.cartalk.com/t/1999-gmc-sierra-pu-fuel-pump-question-low-fuel-pressure-replace-or-do-nothing/2670/3 "2007-08-05T22:55:28Z")

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What was the original reason for visiting the mechanic? Were you having problems with the fuel system? What made them check the fuel pressure in the first place?

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**Author:** ![Big\_Riviera\_1990](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/big_riviera_1990/32/43_2.png) [@Big\_Riviera\_1990](https://community.cartalk.com/u/Big_Riviera_1990)\
**Post date:** [August 5, 2007, 11:47pm UTC](https://community.cartalk.com/t/1999-gmc-sierra-pu-fuel-pump-question-low-fuel-pressure-replace-or-do-nothing/2670/4 "2007-08-05T23:47:26Z")

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Replace the fuel filter first, regardless of how old it is.

-Matt